We found this circuit in an old documentation, but the components used offer no difficulty in obtaining it. The CMOS integrated circuits are powered by a 6V supply.
This circuit is from a 1977 publication for radio amateurs presenting a crowbar protection. The...
Powered by just 1.5 V this 80's amplifier uses an integrated circuit of the era. The circuit is...
This Linear Technology cold cathode fluorescent circuit operates on power from 4.5 V. The...